The BE NORDIC Stop-the-pull Collar from Trixie is designed for dogs and features a rope with a circular weave. It allows for continuous adjustment of the neck circumference and stop via knots. This particular model is Dark Grey/Brown and is sized Small/Medium with a neck circumference of 40 cm and measurements of 40 cm/ø 8 mm. Other available colors include Petrol/Light Grey and Dark Blue/Light Blue, with various sizes ranging from Extra Small to Large-Extra Large, each with different neck circumferences and measurements.